Differences
This shows you the differences between two versions of the page.
| Next revision Both sides next revision | |||
|
techtalk:ref:engmech07n [2020/10/02 16:38] hippysmack created |
techtalk:ref:engmech07n [2020/10/06 19:25] hippysmack [Dyno testing using the timing plug location for an additional crankcase vent by aswracing] |
||
|---|---|---|---|
| Line 8: | Line 8: | ||
| In the stock configuration, the crankcase vents through a pair of "umbrella" valves, which are essentially check valves. \\ | In the stock configuration, the crankcase vents through a pair of "umbrella" valves, which are essentially check valves. \\ | ||
| There is a slight air inlet into the motor from a tiny hole near the umbrella. ((Hippysmack)) \\ | There is a slight air inlet into the motor from a tiny hole near the umbrella. ((Hippysmack)) \\ | ||
| - | It acts as both an oil drain for anything that gets past the umbrella and an air intake to keep negative pressure from getting too high. | + | It acts as both an oil drain for anything that gets past the umbrella and an air intake to keep negative pressure from getting too high. \\ |
| The pistons come down the first time and the crankcase air is expelled with the air being forced out through the umbrella valves. \\ | The pistons come down the first time and the crankcase air is expelled with the air being forced out through the umbrella valves. \\ | ||
